I own a D3100 but not happy with its terrible LCD :(, It's a nice camera but I'm not happy at all and can sell it to a friend of mine who wants to buy it.

If so, my philosophy is always to wait 6 months or a year after something new comes out. Let the early adopters work out all the bugs and take the hits. If you wait, it MIGHT even get discounted a bit, and you will have a lot more feedback to judge from.

That said, it is not unusual for a new bit of technology to have a lot of perceived problems initially that get worked out rather quickly. Most of the time, all this takes is for people to become a little familiar with the quirks of the specific item.

If you don't have a camera now, or are very unhappy with the one you have, go for it!